src/third_party/skia/platform_tools/android/apps/skar_java/src/main/java/com/google/skar/examples/helloskar/helpers/FullScreenHelper.java

/*
 * Copyright 2018 Google LLC All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.skar.examples.helloskar.helpers;

import android.app.Activity;
import android.view.View;
import android.view.WindowManager;

/**
 * Helper to set up the Android full screen mode.
 */
public final class FullScreenHelper {
    /**
     * Sets the Android fullscreen flags. Expected to be called from {@link
     * Activity#onWindowFocusChanged(boolean hasFocus)}.
     *
     * @param activity the Activity on which the full screen mode will be set.
     * @param hasFocus the hasFocus flag passed from the {@link Activity#onWindowFocusChanged(boolean
     *                 hasFocus)} callback.
     */
    public static void setFullScreenOnWindowFocusChanged(Activity activity, boolean hasFocus) {
        if (hasFocus) {
            // https://developer.android.com/training/system-ui/immersive.html#sticky
            activity
                    .getWindow()
                    .getDecorView()
                    .setSystemUiVisibility(
                            View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                                    | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                                    | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                                    | View.SYSTEM_UI_FLAG_FULLSCREEN
                                    | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        }
    }
}